/usr/share/games/BlocksOfTheUndead/assets/lvls/2/6.txt is in blocks-of-the-undead-data 1.0-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//4///
//4///
//15//
//13//
//41//
//13//
//52//
//24//
//34//
//32//
//45//
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